“We’ve got warfare and welfare,” she said, comparing presumptive Republican nominee Mitt Romney and President Obama. “Pick where your money’s spent on. One wants the fishing pole, the other one wants the shoe. And there’s no difference.”

She and thousands of Paul supporters gathered Sunday at the University of South Florida’s Sun Dome for Mr. Paul’s “We Are the Future Rally,” which was a way of thanking his supporters for the legendary dedication they showed throughout the Republican primaries. And many say they’ll repay Mr. Paul by sticking with him, even though he won’t be on the ballot in November.

When asked why he supports Mr. Paul, Richard Conrow, 41, of Winchester, Va., had a rather simple response.

“Why wouldn’t you?” said Mr. Conrow, who plans to vote for Libertarian Party candidate Gary Johnson.

“He’s the only option. When the GOP loses, they can thank us. We’re doing them a service. We’re trying to save them.”

Mr. Paul’s backers here exemplified the eclectic cross-section of the old, the young, politicians, musicians and anti-war advocates he drew together with his libertarian message. And it was difficult to find anyone who was ready to move on.

Jen Staal, 27, of Melbourne, Fla., was also a Paul devotee, and said that even if he is not elected, his campaign would not be in vain.

“In my opinion, he’s kind of already won,” she said. “When he’s running for office for now, at least people talk. And that’s the most important thing — you gotta start somewhere.”